/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.metron.enrichment.parallel;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.function.Function;

/**
 * The strategy to use to construct the thread pool.
 */
public enum WorkerPoolStrategies {
  /**
   * Fixed thread pool
   */
  FIXED(numThreads -> Executors.newFixedThreadPool(numThreads)),
  /**
   * Work stealing thread pool.
   */
  WORK_STEALING(numThreads -> Executors.newWorkStealingPool(numThreads))
  ;
  Function<Integer, ExecutorService> creator;
  WorkerPoolStrategies(Function<Integer, ExecutorService> creator) {
    this.creator = creator;
  }

  public ExecutorService create(int numThreads) {
    return creator.apply(numThreads);
  }
}
